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improve screenshot performance

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FunkyFr3sh 2021-12-17 03:26:51 +01:00
parent c36522d377
commit a44193fe47
1 changed files with 16 additions and 18 deletions
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34
src/screenshot.c
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@ -45,31 +45,30 @@ static BOOL ss_screenshot_8bit(char* filename, IDirectDrawSurfaceImpl* src)
static BOOL ss_screenshot_16bit(char* filename, IDirectDrawSurfaceImpl* src) static BOOL ss_screenshot_16bit(char* filename, IDirectDrawSurfaceImpl* src)
{ {
unsigned int error = TRUE; unsigned int error = TRUE;
unsigned int* dst_buf = malloc(src->width * src->height * 4); unsigned int* buf = malloc(src->width * src->height * 4);
if (dst_buf) if (buf)
{ {
unsigned short* src_buf = (unsigned short*)dds_GetBuffer(src); unsigned short* src_buf = (unsigned short*)dds_GetBuffer(src);
unsigned int* dst_buf = buf;
for (int y = 0; y < src->height; y++) for (int y = 0; y < src->height; y++)
{ {
int dst_row = y * src->width;
for (int x = 0; x < src->width; x++) for (int x = 0; x < src->width; x++)
{ {
unsigned short pixel = src_buf[dst_row + x]; unsigned short pixel = *src_buf++;
BYTE red = ((pixel & 0xF800) >> 11) << 3; BYTE red = ((pixel & 0xF800) >> 11) << 3;
BYTE green = ((pixel & 0x07E0) >> 5) << 2; BYTE green = ((pixel & 0x07E0) >> 5) << 2;
BYTE blue = ((pixel & 0x001F)) << 3; BYTE blue = ((pixel & 0x001F)) << 3;
dst_buf[dst_row + x] = (0xFF << 24) | (blue << 16) | (green << 8) | red; *dst_buf++ = (0xFF << 24) | (blue << 16) | (green << 8) | red;
} }
} }
error = lodepng_encode32_file(filename, (unsigned char*)dst_buf, src->width, src->height); error = lodepng_encode32_file(filename, (unsigned char*)buf, src->width, src->height);
free(dst_buf); free(buf);
} }
return !error; return !error;
@ -78,31 +77,30 @@ static BOOL ss_screenshot_16bit(char* filename, IDirectDrawSurfaceImpl* src)
static BOOL ss_screenshot_32bit(char* filename, IDirectDrawSurfaceImpl* src) static BOOL ss_screenshot_32bit(char* filename, IDirectDrawSurfaceImpl* src)
{ {
unsigned int error = TRUE; unsigned int error = TRUE;
unsigned int* dst_buf = malloc(src->width * src->height * 4); unsigned int* buf = malloc(src->width * src->height * 4);
if (dst_buf) if (buf)
{ {
unsigned int* src_buf = (unsigned int*)dds_GetBuffer(src); unsigned int* src_buf = (unsigned int*)dds_GetBuffer(src);
unsigned int* dst_buf = buf;
for (int y = 0; y < src->height; y++) for (int y = 0; y < src->height; y++)
{ {
int dst_row = y * src->width;
for (int x = 0; x < src->width; x++) for (int x = 0; x < src->width; x++)
{ {
unsigned int pixel = src_buf[dst_row + x]; unsigned int pixel = *src_buf++;
BYTE red = (pixel >> 16) & 0xFF; BYTE red = (pixel >> 16) & 0xFF;
BYTE green = (pixel >> 8) & 0xFF; BYTE green = (pixel >> 8) & 0xFF;
BYTE blue = pixel & 0xFF; BYTE blue = pixel & 0xFF;
dst_buf[dst_row + x] = (0xFF << 24) | (blue << 16) | (green << 8) | red; *dst_buf++ = (0xFF << 24) | (blue << 16) | (green << 8) | red;
} }
} }
error = lodepng_encode32_file(filename, (unsigned char*)dst_buf, src->width, src->height); error = lodepng_encode32_file(filename, (unsigned char*)buf, src->width, src->height);
free(dst_buf); free(buf);
} }
return !error; return !error;